Third-Party JavaScript guides web developers through the complete development of a full-featured third-party JavaScript application. You’ll learn dozens of techniques for developing widgets that collect data for analytics, provide helpful overlays and dialogs, or implement features like chat or commenting. The concepts and examples throughout this book represent the best practices for this emerging field, based on thousands of real-world dev hours and results from millions of users.
There’s an art to writing third-party JavaScript—embeddable scripts that can plug into any website. They must adapt easily to unknown host environments, coexist with other applications, and manage the tricky security vulnerabilities you get when code and asset files are served from remote web addresses. Get it right and you have unlimited options for distributing your apps. This unique book shows you how.
Third-Party JavaScript guides you through the ins and outs of building full-featured third-party JavaScript applications. You’ll learn techniques for developing widgets that collect data for analytics, provide helpful overlays and dialogs, or implement features like chat and commenting. The concepts and examples throughout the book represent the best practices for this emerging field, based on thousands of real-world dev hours and results from millions of users.
Written for web developers who know JavaScript, this book requires no prior knowledge of third-party apps.
What’s Inside

Writing conflict-free JavaScript, HTML, and CSS
Making cross-domain requests from the browser
How to overcome third-party cookie limitations
Security vulnerabilities of third-party applications